Email relay solution for 1-2-1 Marketing

If you are a sender providing email relay services, how do you make sure that bounces and complaints are properly handled? Often the emails are generated by applications that hand-off the delivery to a relay service but have no means for processing returning bounces. This was also a question at 1-2-1 Marketing, a Texas based […]

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Categories: Case Studies, General, PowerMTA

About the Return-Path header

The most common error senders make is adding a Return-Path header to their mail. Even some well known mail software does this. Probably written by programmers who copy from others rather than reading RFCs (the internet standards that specify SMTP and MIME). What does the standard say about Return-Path? The following fragment is from RFC […]

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Categories: General

DKIM recipe for PowerMTA

DomainKeys, and it’s successor DKIM, are important email authentication techniques. Based on cryptography, they are more secure than SPF and Sender ID. With DomainKeys/DKIM the integrity of the content is also protected and authentication does not break when emails are being forwarded. DomainKeys/DKIM is used by large webmail providers such as Google, Yahoo and AOL. […]

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Categories: General, PowerMTA